Which one of the following characteristics is not shared by birds and mammals?

(a) warm blooded nature
(b) Ossified endoskeleton
(c) Breathing using lungs
(d) Viviparity

Anurag Mishra Professor Asked on 2nd May 2016 in Biology.
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    Answer: (d)  Viviparity

    Anurag Mishra Professor Answered on 4th May 2016.
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